Yes I absolutely agree that they weren't all funny, some of the ones referenced above made me a bit judgy pants but I also know that sometimes people/animals do daft things.
I can't imagine leaving DDog at services either (can't figure out why would the dog be loose/tied up outside the car?) but when I first got him I almost left him tied up outside the local shop because I was distracted, walked a few paces away and realised!
Despite training and keeping a close eye on him he will occasionally do something hugely embarrassing like one time he stealthily stole a little boys biscuit out of his hand (extremely gently mind you - not the point but no child was harmed!) as I was talking to his mum 
Absolutely mortifying, not his usual behaviour and he's adequately fed!
The little boy just looked a bit confused about the disappearing biscuit and the mum thought it was hilarious, I did not!
I've thawed a little on it now and can have a wee giggle about it but at the time I was really embarrassed. Shit happens sometimes even with the best will and decent training in place.